Uttar Pradesh BJP general secretary Pankaj Singh, who has been busy campaigning for his father and Home Minister Rajnath Singh in the Lucknow Lok Sabha seat, said it is not a "tight fight" for the Union Minister who is seeking re-election from this constituency. "I am very sure the (winning) margin is going to increase this time," Pankaj Singh told NDTV today after he and his father voted at a polling booth in Lucknow.